My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6311UK00D3
- Part No.:
- MAX6311UK00D3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6311UK00D3.pdf
- Description:
- IC SUPERVISOR PROGRAMMABLE RESET
- Quantity:
- Payment:
- Shipping:
Inventory:1,212
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6311UK00D3 from Maxim Integrated is a 5-pin SOT23 programmable supervisory IC designed to monitor dual power supplies (e.g., 5V and 3.3V) in embedded systems, asserting an active-high push/pull RESET signal when either supply falls below its factory-set threshold. It features a 0V nominal VCC reset threshold (UK00), 140ms minimum reset timeout (D3), 8µA supply current, and guaranteed RESET validity down to VCC = 1V. It is used in portable computers and multivoltage industrial controllers requiring reliable brownout detection.
For engineers reviewing the MAX6311UK00D3 datasheet, MAX6311UK00D3 pinout, MAX6311UK00D3 application, or MAX6311UK00D3 equivalent, key selection considerations include its active-high RESET output, dual adjustable undervoltage inputs (RST IN1/RST IN2), immunity to fast VCC transients, and factory-programmed 0V threshold with 140ms timeout - critical for deterministic system initialization in battery-powered and space-constrained designs.
Technical Context
The MAX6311UK00D3 implements a dual-input undervoltage monitoring architecture with two independent comparator inputs (RST IN1 and RST IN2), each referenced to a precise 1.23V internal bandgap. Its VCC monitor is configured for 0V threshold (UK00), meaning it does not actively supervise VCC but relies entirely on external resistor dividers applied to RST IN1 and RST IN2 to set custom reset points for two separate rails.
It uses a precision internal timer to enforce a minimum 140ms (D3) reset assertion period after all monitored voltages return above threshold, ensuring stable µP startup. The active-high push/pull RESET output sources/sinks current without requiring an external pull-up, and the device remains functional down to VCC = 1V while ignoring transients <200ns at full overdrive - confirmed by Typical Operating Characteristics graphs TOC7–TOC9.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | +2.5V to +5.5V - supports operation across common logic supply rails; valid only when external inputs are properly biased. |
| Supply Current | 8µA typical - enables ultra-low-power supervision in battery-backed or energy-harvesting systems. |
| RESET Output Type | Active-high push/pull - eliminates need for external pull-up resistor; drives high/low actively for direct µP interface. |
| Reset Timeout Period | 140ms minimum (D3) - ensures sufficient hold time for microprocessor core and peripheral initialization before release. |
| RST IN Threshold Reference | 1.23V ±20mV - stable internal reference enabling accurate external voltage divider-based threshold programming. |
| Input Leakage Current | ±25nA max - permits use of high-value (MΩ-range) resistors in external dividers without significant threshold error. |
| Transient Immunity | Immune to VCC transients <200ns at full overdrive - prevents spurious resets during switching noise or ESD events. |
Pinout & Package
MAX6311UK00D3 is housed in a 5-pin SOT23 package (package code U5+1, outline 21-0057), measuring 2.9mm × 1.6mm × 1.1mm, suitable for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-high push/pull reset output | Drives µP reset pin directly; asserts high during fault condition; deasserts cleanly after timeout. |
| 2 - GND | System ground reference | Return path for all internal comparators and output stage; must be low-impedance for noise immunity. |
| 3 - RST IN1 | First adjustable undervoltage comparator input | Monitors rail #1 via external resistor divider; asserts reset if voltage falls below programmed threshold. |
| 4 - RST IN2 | Second adjustable undervoltage comparator input | Monitors rail #2 independently; enables dual-rail supervision without additional ICs. |
| 5 - VCC | Device supply input | Power source for internal circuitry; no VCC supervision (UK00 variant); must be ≥2.5V for operation. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent undervoltage inputs | Enables simultaneous monitoring of two distinct power rails (e.g., 3.3V I/O and 1.8V core) using one IC. |
| Factory-programmed 0V VCC threshold (UK00) | Disables internal VCC supervision, freeing the device to focus exclusively on externally configured rails. |
| 140ms minimum reset timeout (D3) | Guarantees µP reset pulse width meets boot-time requirements of ARM Cortex-M and similar embedded processors. |
| Active-high push/pull RESET output | Eliminates external pull-up resistor, reduces BOM count, and improves noise margin vs. open-drain alternatives. |
| ±25nA input leakage on RST IN pins | Allows >1MΩ resistor values in external dividers, minimizing quiescent current draw in battery-critical applications. |
Applications
| Industrial PLC Power Sequencing | Medical Portable Monitor |
|---|---|
Use Scenario: A programmable logic controller requires coordinated startup of 24V field bus, 5V logic, and 3.3V communication rails. IC Role / Device Role / Timing Role: MAX6311UK00D3 monitors 5V and 3.3V rails via RST IN1/RST IN2, asserting RESET until both stabilize, then holding for 140ms before releasing. Use Value: Prevents firmware execution before all peripherals are powered and clocked, eliminating erratic I/O behavior during cold start. |
Use Scenario: A handheld patient monitor runs on rechargeable Li-ion and must survive brief voltage sags during display backlight activation. IC Role / Device Role / Timing Role: MAX6311UK00D3 supervises main 3.3V system rail and backup 1.8V SRAM rail, triggering reset on either sag. Use Value: Ensures data integrity in volatile memory by forcing controlled reboot before corrupted state propagates. |
| Automotive Infotainment Head Unit | IoT Edge Gateway |
Use Scenario: An automotive head unit integrates multiple SoCs sharing 5V and 12V-derived 3.3V supplies subject to load dump transients. IC Role / Device Role / Timing Role: MAX6311UK00D3 applies RST IN1 to 5V domain and RST IN2 to isolated 3.3V domain, rejecting sub-200ns noise spikes per TOC7. Use Value: Avoids false resets during alternator switching events, maintaining UI continuity and CAN bus session stability. |
Use Scenario: An industrial IoT gateway powers cellular modem (3.8V), MCU (3.3V), and sensor interface (2.8V) from a single buck converter. IC Role / Device Role / Timing Role: MAX6311UK00D3 configures RST IN1 for 3.3V MCU rail and RST IN2 for 2.8V sensor rail, enforcing synchronized reset. Use Value: Guarantees atomic firmware update readiness across subsystems, preventing partial configuration writes during brownout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-rail supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6311UK29D3 | Factory-set VCC threshold = 2.9V (vs. UK00's 0V); retains same RST IN1/RST IN2 capability and D3 timeout. | Supervises VCC *and* two external rails; suitable when primary supply (e.g., 3.3V) must also be monitored. | Select UK29D3 if VCC supervision is required; UK00D3 is optimal when only external rails need monitoring. |
| TPS3808G33DBVR | Single-input supervisor with fixed 3.3V threshold; no dual-RST IN capability; 200ms timeout; 1.6µA supply current. | Lacks independent dual-rail monitoring; requires two devices to match MAX6311UK00D3 functionality. | Choose TPS3808G33DBVR only for single-rail cost-sensitive designs; MAX6311UK00D3 provides integration advantage. |
Compared with MAX6311UK29D3, the MAX6311UK00D3 removes VCC supervision to maximize flexibility for custom rail monitoring, while versus TPS3808G33DBVR, it delivers true dual-input supervision in one package - reducing board area, BOM count, and interconnect complexity in multivoltage systems.
Availability
MAX6311UK00D3 is available at Aetrix Electronics and suitable for portable computers, industrial PLCs, medical monitors, and automotive infotainment systems requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MAX6311UK00D3 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, computing, and communications markets.
The MAX6305–MAX6313 family was designed specifically for multivoltage microprocessor supervision in space-constrained, low-power systems - emphasizing precision threshold setting, transient immunity, and minimal external components.
FAQ
What is the function of the UK00 suffix in MAX6311UK00D3?
The UK00 suffix indicates that the MAX6311UK00D3 has a factory-programmed VCC reset threshold of 0V, meaning its internal VCC monitor is disabled. This allows the device to operate solely as a dual-input supervisor using only RST IN1 and RST IN2 for external rail monitoring - ideal when VCC itself is not the primary supply under supervision.
Does MAX6311UK00D3 provide VCC supervision?
No, MAX6311UK00D3 does not supervise VCC due to its UK00 configuration. Its VCC pin serves only as the device's power supply (2.5V–5.5V). Supervision is performed exclusively on external rails connected to RST IN1 and RST IN2 via resistor dividers. This differs from variants like MAX6311UK29D3, which actively monitors VCC at 2.9V.
What is the significance of the D3 suffix in MAX6311UK00D3?
The D3 suffix specifies a factory-programmed minimum reset timeout period of 140ms for MAX6311UK00D3. This ensures the active-high RESET signal remains asserted for at least 140ms after all monitored supplies exceed their thresholds, providing sufficient time for microprocessor core initialization, PLL lock, and peripheral configuration before system execution resumes.
Can MAX6311UK00D3 monitor more than two voltage rails?
No, MAX6311UK00D3 supports exactly two independent undervoltage monitoring channels via RST IN1 and RST IN2. Each input compares an externally divided voltage against the internal 1.23V reference. To supervise three or more rails, multiple MAX6311UK00D3 units or a higher-channel supervisor (e.g., MAX6816) would be required.
Is MAX6311UK00D3 compatible with 1.8V logic systems?
Yes, MAX6311UK00D3 can interface with 1.8V logic systems because its RST IN1 and RST IN2 inputs accept any voltage divider output referenced to the 1.23V internal threshold - including those derived from 1.8V rails. However, VCC must be ≥2.5V for device operation, so a local 3.3V or 5V supply is required to power the IC itself.
MAX6311UK00D3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6311UK00D3 FAQ
1.How can I place an order for MAX6311UK00D3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6311UK00D3 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX6311UK00D3 reliable?
The price and inventory of MAX6311UK00D3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6311UK00D3 is usually 5 days.
3.What payment methods are accepted for MAX6311UK00D3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6311UK00D3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6311UK00D3?
MAX6311UK00D3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6311UK00D3 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX6311UK00D3?
For technical support, including MAX6311UK00D3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6311UK00D3 requirements.
6.How does Aetrix verify that MAX6311UK00D3 is sourced from the original manufacturer or authorized distributors?
All MAX6311UK00D3 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX6311UK00D3 meets industry standards.
7.What is the process for return or replacement of MAX6311UK00D3?
All MAX6311UK00D3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6311UK00D3, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX6311UK00D3 part is unused and in its original packaging.
Return procedure for MAX6311UK00D3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6311UK00D3 Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
